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       Human cardiac catheterization was introduced by Werner Forssman in
       1929.  Ignoring his department chief, and tying his assistant to an
       operating table to prevent his interference, he placed a urethral
       catheter into a vein in his arm, advanced it to the right atrium [o
       his heart], and walked upstairs to the x-ray department where he to
       the confirmatory x-ray film.  In 1956, Dr. Forssman was awarded the
       Nobel Prize.